Idle Air Control Valve?

[J.L.T.]

2002 4.0 IAC Valve sticking

[J.L.T.]

I just got my truck back from the shop. It has been hard to start. You have to keep foot on the throttle to keep it running when cold. Then when it stays running it will start and run fine until it cools off again. The shop said it was a sticky IAC vavle and they freed it up, at no cost to me. What does it look like and where is it?

[cberentsen]

Originally Posted by defaxxer

I have a 2000 Mazda B3000 that is driving me insane. It is fuel-injected and has a manual transmission. Here's the problem: When I come out of generally first, second, or third gears while shifting up, I take my foot off the gas, push the clutch, and shift. Well, the problem is that after I push the clutch, the engine revvs up to around 3-4000 rpms and will stay there for around 3-4 seconds before dropping back down. If I shift into gear while this is happening, I can actually keep my foot off the gas and the car will continue to accelerate rapidly until the engine decides to stop revving. When I first noticed this problem, it normally only did it when the car was running cold, but now it just does it all the time. At these gas prices I can no longer sit by and watch this happen. I talked to a mechanic and he told me it was probably my IAC valve. I assume this is Idle Air Control Valve, or possibly my EGR, No idea what that means. I'm am an avid do-it-yourselfer and would like to know if this is something i can fix or if i have to be raped at the mechanic seven times before they actually fix the problem.

What did this problem turn out to be, dirty IAC?

[r103rider]

I am having much of the same issues and have replaced ALOT of parts with no success. Also...in conjunction to everybody elses issues....I have a oil pressure sensor that wigs out during the almost stalled idle situation.

Heres how mine goes, fires up beautifully in the morning....CEL will come right on within seconds...I xrive to a local store and get my coffee, sitting at a angle usually (sometimes on level ground but takes longer)....the idle will begin to drop, you can see the black smoke crom excess fuel being dumped at this problem via the ecu....meanwhile my oil pressure sensor will (sometimes) start flicking back and forth....not always does it. I also at times when shifting it MAY iincrease rpms (but not much, I have completely torn the TB apart and cleaned it along)

So to date I have:
Replaced all 3 o2 sensors
Replaced EGR and cleaned the tube leading down
Replaced the IAC
Today will replace the MAF although from what I been reading...expect nothing
Have sprayed the entire engine with multiple cans of carb cleaner and cant seem yo see any difference in idle.

Please help.....,I am a courier and drive this truck everyday and I cant afford to continue replacing parts on it....not just keep xumping fuel like this.

I would prefer a text or a call or if your local phx/tempe/mesa/chanxler....a call or stop on by if ya can

Thank you in advance